This chemical is primarily utilized in bioconjugation and click chemistry applications. Its azide group allows for efficient and selective reactions with alkyne-functionalized molecules, making it a valuable tool in the development of bioconjugates, such as antibody-drug conjugates (ADCs) and protein labeling. The PEG4 spacer enhances solubility and reduces steric hindrance, improving the efficiency of conjugation processes. Additionally, it is employed in the synthesis of complex biomolecules, including peptides and nucleic acids, for research and therapeutic purposes. Its role in bioorthogonal chemistry also supports advancements in imaging and diagnostics, enabling precise targeting and visualization in biological systems.